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The half life of radium-226 is 1620 years. Initially, there are 2-grams in a sample. (a) Half life decay can be modeled by an

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The half life of radium-226 is 1620 years. Initially, there are 2-grams in a sample. (a) Half life decay can be modeled by an exponential function: N(t) = Noekt. Use the growth equation, kt = ln to find k. No (b) How many grams remain after 10 years? (c) How long will it take for 80% of the 2 grams to decay?

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